Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years
Background and purpose — The anatomical uncemented stem, SP-CL (Static Physiologicus – CementLess), designed to facilitate insertion and to avoid stress concentration at solitary contact points, has been on the market since 2014 but is not well documented. We studied its clinical performance, migrat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Medical Journals Sweden
2022-01-01
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| Series: | Acta Orthopaedica |
| Subjects: | |
| Online Access: | https://actaorthop.org/actao/article/view/943 |
| _version_ | 1818893869289308160 |
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| author | Karin Rilby Maziar Mohaddes Emma Nauclér Johan Kärrholm |
| author_facet | Karin Rilby Maziar Mohaddes Emma Nauclér Johan Kärrholm |
| author_sort | Karin Rilby |
| collection | DOAJ |
| description | Background and purpose — The anatomical uncemented stem, SP-CL (Static Physiologicus – CementLess), designed to facilitate insertion and to avoid stress concentration at solitary contact points, has been on the market since 2014 but is not well documented. We studied its clinical performance, migration, and associated bone remodeling in a randomized controlled trial, with the Corail stem as control.
Patients and methods — 79 patients (80 hips) were primarily recruited and 71 patients (72 hips, 36 SP-CL, 36 Corail) attended the last follow-up at 2 years. The Oxford Hip Score (OHS) was the primary outcome. In addition, we assessed stem migration, changes in bone mineral density, and development of radiolucencies by RSA, DXA, and conventional radiography.
Results — At 2 years Oxford Hip Score was similar between the SP-CL and Corail stem. At 2 years the SP-CL stems showed a median distal migration of 0.23 mm (–0.1 to 5.2) and the Corail stems of 0.11 mm (–0.4 to 4.4). The SP-CL stems showed slightly more loss of bone mineral density in Gruen region 7 (p = 0.003).
Interpretation — We found no difference in clinical results between the SP-CL and the well-documented Corail stem. The same stem stability was reached between 1 and 2 years postoperatively for both stems. As a next step we think that the SP-CL stem should be studied in a multi-center setting, before being accepted for general use. |
| first_indexed | 2024-12-19T18:19:27Z |
| format | Article |
| id | doaj.art-07bc05a4bb5c4691ac2cea9a4532c22b |
| institution | Directory Open Access Journal |
| issn | 1745-3674 1745-3682 |
| language | English |
| last_indexed | 2024-12-19T18:19:27Z |
| publishDate | 2022-01-01 |
| publisher | Medical Journals Sweden |
| record_format | Article |
| series | Acta Orthopaedica |
| spelling | doaj.art-07bc05a4bb5c4691ac2cea9a4532c22b2022-12-21T20:11:01ZengMedical Journals SwedenActa Orthopaedica1745-36741745-36822022-01-019310.1080/17453674.2021.1993606943Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 yearsKarin Rilby0Maziar Mohaddes1Emma Nauclér2Johan Kärrholm3Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of GothenburgDepartment of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg; Swedish Hip Arthroplasty Register, Gothenburg, SwedenSwedish Hip Arthroplasty Register, Gothenburg, SwedenDepartment of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg; Swedish Hip Arthroplasty Register, Gothenburg, SwedenBackground and purpose — The anatomical uncemented stem, SP-CL (Static Physiologicus – CementLess), designed to facilitate insertion and to avoid stress concentration at solitary contact points, has been on the market since 2014 but is not well documented. We studied its clinical performance, migration, and associated bone remodeling in a randomized controlled trial, with the Corail stem as control. Patients and methods — 79 patients (80 hips) were primarily recruited and 71 patients (72 hips, 36 SP-CL, 36 Corail) attended the last follow-up at 2 years. The Oxford Hip Score (OHS) was the primary outcome. In addition, we assessed stem migration, changes in bone mineral density, and development of radiolucencies by RSA, DXA, and conventional radiography. Results — At 2 years Oxford Hip Score was similar between the SP-CL and Corail stem. At 2 years the SP-CL stems showed a median distal migration of 0.23 mm (–0.1 to 5.2) and the Corail stems of 0.11 mm (–0.4 to 4.4). The SP-CL stems showed slightly more loss of bone mineral density in Gruen region 7 (p = 0.003). Interpretation — We found no difference in clinical results between the SP-CL and the well-documented Corail stem. The same stem stability was reached between 1 and 2 years postoperatively for both stems. As a next step we think that the SP-CL stem should be studied in a multi-center setting, before being accepted for general use.https://actaorthop.org/actao/article/view/943ArthroplastyHipImplants |
| spellingShingle | Karin Rilby Maziar Mohaddes Emma Nauclér Johan Kärrholm Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years Acta Orthopaedica Arthroplasty Hip Implants |
| title | Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years |
| title_full | Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years |
| title_fullStr | Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years |
| title_full_unstemmed | Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years |
| title_short | Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years |
| title_sort | similar outcome with a new anteverted or a straight standard stem a randomized study of 72 total hip arthroplasties evaluated with clinical variables radiostereometry and dxa up to 2 years |
| topic | Arthroplasty Hip Implants |
| url | https://actaorthop.org/actao/article/view/943 |
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